How to Design green buildings services? What is the advantage to design green building?

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what is the benefit of floating our DC source? if i have two floating DC source of which 1 has a ref voltage of -21VDC and the other of -18VDC. can it be connected in parallel to share a common ref voltage? if not, how do i make both sources to be of common ref voltage? tks

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please let me know , we have installed two separate motor for fire fighting system 1) 60 hp and 2) 15 hp the load is 74 AMPS and 20 AMPS then tell me the main power cable in Aluminum will be what thickness , the length is 225 mt from the main utility to fire pump house

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what is feed back and what are feed back amplifiers?

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i need to calulate the cable size when watts are mentaind wat z the formula

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6. A DC AMMETER HAS R=0.1 OHM & CURRENT RANGE IS 0-100 A IF THE RANGE IS TO BE EXTENDED TO 0-500 A THEN METER REQUIRES SHUNT RESISTANCE OF ..........

2 Answers   SSC,

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Why is water motor not taking the pressure? what is the problem?

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How is earthing done in Aerospace applications such as Flights and spaceships..?

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What are the site acceptance tests for power cables, DG Sets, LT panels & 30kVA UPS ?

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Hi friends I am a service engineer in electrical field i plan to shift design engineer in same field, so i request your suggestion for what software or course i want to learn ?

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The moisture in air will condense at

0 Answers   Caterpillar,

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what is the reason of battery voltage is 12v maintain?please answer me.mail-psrinivasan20@yahoo.com

1 Answers   CTS,

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